The £10m goalkeeper has signed a four-year deal with the Saints after quitting Celtic.

The Scottish giants were given a Euro reprieve last week despite being beaten by Legia Warsaw in the third qualifying round, but that was not enough to keep England international Forster north of the border.

NEW CHALLENGE: Forster will compete with Boruc for a starting spot at Southampton [GETTY]

“It has been a brilliant experience, but I felt now was the right time for a new challenge in the English Premier League”

Fraser Forster

"I have accepted a new opportunity away from Celtic," said the 26-year-old, who spent four years in Glasgow winning three league titles and two Scottish Cups.

"I know the club wanted me to stay and I know they did everything they possibly can to keep me.

"It has been a brilliant experience, but I felt now was the right time for a new challenge in the English Premier League."

Southampton boss Ronald Koeman, who has lost five first team players already this summer, believes Forster can be a key component to his Saints revolution.

Koeman said: "Fraser is a very talented player. He is the perfect fit to help complement the players we already have and he will add a lot of quality to the squad.

"This is another important part of our rebuilding process ahead of the start of the season and I am confident we will be able to help him improve even further."